From: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Add device tree support to the DW watchdog timer.
Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Acked-by: Jamie Iles <jamie@xxxxxxxxxxxxx>
Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
Reviewed-by: Pavel Machek <pavel@xxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Viresh Kumar <viresh.linux@xxxxxxxxx>
Cc: Wim Van Sebroeck <wim@xxxxxxxxx>
Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Stephen Warren <swarren@xxxxxxxxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-watchdog@xxxxxxxxxxxxxxx
---
v6:
- Minor documentation fix and add Acked-by: Mark Rutland
v5:
- Add documentation for clocks property
v4:
- Add interrupts as an optional property, use "should contain".
v3:
- Clean up documentation
v2:
- Use of_match_ptr() for of_match_table
---
.../devicetree/bindings/watchdog/dw_wdt.txt | 21 ++++++++++++++++++++
drivers/watchdog/dw_wdt.c | 8 ++++++++
2 files changed, 29 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/dw_wdt.txt
diff --git a/Documentation/devicetree/bindings/watchdog/dw_wdt.txt b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt
new file mode 100644
index 0000000..08e16f6
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt
@@ -0,0 +1,21 @@
+Synopsys Designware Watchdog Timer
+
+Required Properties:
+
+- compatible : Should contain "snps,dw-wdt"
+- reg : Base address and size of the watchdog timer registers.
+- clocks : phandle + clock-specifier for the clock that drives the
+ watchdog timer.
+
+Optional Properties:
+
+- interrupts : The interrupt used for the watchdog timeout warning.
+
+Example:
+
+ watchdog0: wd@ffd02000 {
+ compatible = "snps,dw-wdt";
+ reg = <0xffd02000 0x1000>;
+ interrupts = <0 171 4>;
+ clocks = <&per_base_clk>;
+ };
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index e621098..261fa42 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c
@@ -29,6 +29,7 @@
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/of.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
@@ -340,12 +341,19 @@ static int dw_wdt_drv_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id dw_wdt_of_match[] = {
+ { .compatible = "snps,dw-wdt", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw_wdt_of_match);
+
static struct platform_driver dw_wdt_driver = {
.probe = dw_wdt_drv_probe,
.remove = dw_wdt_drv_remove,
.driver = {
.name = "dw_wdt",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(dw_wdt_of_match),
#ifdef CONFIG_PM
.pm = &dw_wdt_pm_ops,
#endif /* CONFIG_PM */
--
1.7.9.5
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